Table 1.
Effects of weaning age and parity on ammonia, VFA, and pH in rumen fluid evaluated by two-way ANOVA on experimental d 140. Values are presented as Means with SD
| Early-weaning | Late-weaning | p-values | |||||
|---|---|---|---|---|---|---|---|
| Parameters | MC | PC | MC | PC | Weaning age W | Parity P | W*P |
| Ammonia-N (mg/100 g) |
2.33 ± 1.25 |
1.91 ± 1.71 |
2.93 ± 2.07 |
2.52 ± 1.18 |
0.144 | 0.289 | 1 |
|
Acetate (mmol/L) |
35.89 ± 6.71 |
37.99 ± 8.23 |
36.15 ± 6.78 |
38.06 ± 5.88 |
0.971 | 0.278 | 0.917 |
| Propionate (mmol/L) |
9.44 ± 1.91 |
10.42 ± 2.18 |
9.91 ± 2.38 |
10.65 ± 2.89 |
0.605 | 0.170 | 0.723 |
|
Butyrate (mmol/L) |
5.13 ± 1.67 |
5.76 ± 1.67 |
5.11 ± 1.50 |
5.52 ± 2.00 |
0.741 | 0.234 | 0.876 |
| Iso-Butyrate (mmol/L) | 0.66 ± 0.15 | 0.74 ± 0.16 | 0.67 ± 0.15 | 0.74 ± 0.20 | 0.948 | 0.099 | 0.974 |
|
Valerate (mmol/L) |
0.70 ± 0.19 |
0.82 ± 0.21 |
0.74 ± 0.24 |
0.72 ± 0.22 |
0.630 | 0.337 | 0.238 |
| Iso-Valerate (mmol/L) | 1.10 ± 0.52 | 1.36 ± 0.55 | 0.99 ± 0.22 | 1.15 ± 0.46 | 0.172 | 0.078 | 0.665 |
| Total VFA (mmol/L) |
52.92 ± 10.25 |
57.10 ± 12.12 |
53.57 ± 10.23 |
56.84 ± 10.22 |
0.990 | 0.189 | 0.856 |
| Ratio acetate:propionate |
3.84 ± 0.47 |
3.67 ± 0.44 |
3.74 ± 0.60 |
3.69 ± 0.56 |
0.781 | 0.435 | 0.643 |
| pH |
7.34 ± 0.21 |
7.32 ± 0.27 |
7.35 ± 0.21 |
7.32 ± 0.17 |
0.857 | 0.684 | 0.960 |